In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix oops due to unset link speed
It isn't guaranteed that NETWORK_INTERFACE_INFO::LinkSpeed will always be set by the server, so the client must handle any values and then prevent oopses like below from happening:
Oops: divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 1323 Comm: cat Not tainted 6.13.0-rc7 #2 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-3.fc41 04/01/2014 RIP: 0010:cifs_debug_data_proc_show+0xa45/0x1460 [cifs] Code: 00 00 48 89 df e8 3b cd 1b c1 41 f6 44 24 2c 04 0f 84 50 01 00 00 48 89 ef e8 e7 d0 1b c1 49 8b 44 24 18 31 d2 49 8d 7c 24 28 <48> f7 74 24 18 48 89 c3 e8 6e cf 1b c1 41 8b 6c 24 28 49 8d 7c 24 RSP: 0018:ffffc90001817be0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88811230022c RCX: ffffffffc041bd99 RDX: 0000000000000000 RSI: 0000000000000567 RDI: ffff888112300228 RBP: ffff888112300218 R08: fffff52000302f5f R09: ffffed1022fa58ac R10: ffff888117d2c566 R11: 00000000fffffffe R12: ffff888112300200 R13: 000000012a15343f R14: 0000000000000001 R15: ffff888113f2db58 FS: 00007fe27119e740(0000) GS:ffff888148600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe2633c5000 CR3: 0000000124da0000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? __die_body.cold+0x19/0x27 ? die+0x2e/0x50 ? do_trap+0x159/0x1b0 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? do_error_trap+0x90/0x130 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? exc_divide_error+0x39/0x50 ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? asm_exc_divide_error+0x1a/0x20 ? cifs_debug_data_proc_show+0xa39/0x1460 [cifs] ? cifs_debug_data_proc_show+0xa45/0x1460 [cifs] ? seq_read_iter+0x42e/0x790 seq_read_iter+0x19a/0x790 proc_reg_read_iter+0xbe/0x110 ? __pfx_proc_reg_read_iter+0x10/0x10 vfs_read+0x469/0x570 ? do_user_addr_fault+0x398/0x760 ? __pfx_vfs_read+0x10/0x10 ? find_held_lock+0x8a/0xa0 ? __pfx_lock_release+0x10/0x10 ksys_read+0xd3/0x170 ? __pfx_ksys_read+0x10/0x10 ? __rcu_read_unlock+0x50/0x270 ? mark_held_locks+0x1a/0x90 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe271288911 Code: 00 48 8b 15 01 25 10 00 f7 d8 64 89 02 b8 ff ff ff ff eb bd e8 20 ad 01 00 f3 0f 1e fa 80 3d b5 a7 10 00 00 74 13 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 4f c3 66 0f 1f 44 00 00 55 48 89 e5 48 83 ec RSP: 002b:00007ffe87c079d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000040000 RCX: 00007fe271288911 RDX: 0000000000040000 RSI: 00007fe2633c6000 RDI: 0000000000000003 RBP: 00007ffe87c07a00 R08: 0000000000000000 R09: 00007fe2713e6380 R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000040000 R13: 00007fe2633c6000 R14: 0000000000000003 R15: 0000000000000000 </TASK>
Fix this by setting cifs_server_iface::speed to a sane value (1Gbps) by default when link speed is unset.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-develUpgrade perfUpgrade kernel-modules-extra-commonUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.1.129-138.220Upgrade perf-debuginfoUpgrade kernel-tools-develUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-modules-extraUpgrade kernel-libbpfUpgrade kernelUpgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-libbpf-develUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-static | Jun 11, 2025 | Feb 27, 2025 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Mar 17, 2025 | Feb 27, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 27, 2025 |
| Suse | — | Upgrade kernel-rt-livepatch-develUpgrade reiserfs-kmp-rtUpgrade kselftests-kmp-rtUpgrade kernel-zfcpdumpUpgrade kernel-rt_debugUpgrade kernel-symsUpgrade dtb-armUpgrade dtb-rockchipUpgrade kernel-azure-vdsoUpgrade kernel-kvmsmall-vdsoUpgrade dtb-appleUpgrade dlm-kmp-defaultUpgrade kernel-syms-azureUpgrade reiserfs-kmp-64kbUpgrade gfs2-kmp-rtUpgrade kernel-devel-azureUpgrade kernel-macrosUpgrade kselftests-kmp-defaultUpgrade dlm-kmp-azureUpgrade dtb-apmUpgrade kernel-kvmsmallUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-optionalUpgrade dtb-amlogicUpgrade kernel-kvmsmall-develUpgrade kernel-syms-rtUpgrade dtb-socionextUpgrade dtb-broadcomUpgrade kernel-azure-develUpgrade kernel-defaultUpgrade kernel-obs-qaUpgrade kernel-default-extraUpgrade gfs2-kmp-64kbUpgrade ocfs2-kmp-rtUpgrade kernel-rtUpgrade kernel-rt-vdsoUpgrade kernel-source-rtUpgrade dtb-marvellUpgrade kernel-rt_debug-vdsoUpgrade kernel-docs-htmlUpgrade kernel-azure-extraUpgrade cluster-md-kmp-azureUpgrade kernel-default-base-rebuildUpgrade kernel-docsUpgrade dtb-alteraUpgrade kernel-develUpgrade kernel-source-vanillaUpgrade kernel-rt_debug-develUpgrade kernel-default-baseUpgrade kernel-debugUpgrade cluster-md-kmp-rtUpgrade dtb-hisiliconUpgrade kselftests-kmp-azureUpgrade kernel-rt-develUpgrade kernel-debug-develUpgrade dtb-amdUpgrade reiserfs-kmp-defaultUpgrade dtb-freescaleUpgrade dtb-xilinxUpgrade gfs2-kmp-azureUpgrade kernel-default-livepatch-develUpgrade kernel-source-azureUpgrade kernel-default-vdsoUpgrade kernel-default-develUpgrade dlm-kmp-64kbUpgrade dtb-sprdUpgrade dtb-mediatekUpgrade kernel-default-optionalUpgrade kernel-default-livepatchUpgrade kernel-debug-vdsoUpgrade kernel-azure-optionalUpgrade ocfs2-kmp-defaultUpgrade ocfs2-kmp-azureUpgrade kernel-obs-buildUpgrade kernel-devel-rtUpgrade reiserfs-kmp-azureUpgrade kselftests-kmp-64kbUpgrade kernel-64kb-optionalUpgrade cluster-md-kmp-64kbUpgrade dtb-lgUpgrade dtb-allwinnerUpgrade kernel-64kbUpgrade dtb-exynosUpgrade kernel-sourceUpgrade kernel-rt-extraUpgrade kernel-64kb-develUpgrade kernel-azureUpgrade kernel-64kb-extraUpgrade dtb-renesasUpgrade dtb-qcomUpgrade dtb-nvidiaUpgrade dtb-caviumUpgrade dtb-amazonUpgrade dlm-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade gfs2-kmp-default | Mar 13, 2025 | Feb 27, 2025 |
| Ubuntu | — | Upgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1016-oracle-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-ibm-6.8Upgrade linux-image-6.11.0-1015-azureUpgrade linux-image-gcp-6.8Upgrade linux-image-6.8.0-1031-nvidiaUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-azure-fde-6.8Upgrade linux-image-6.11.0-1014-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1029-oracle-64kUpgrade linux-image-realtimeUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1032-aws-64kUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-6.8.1-1025-realtimeUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.11.0-1014-lowlatency-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1031-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1029-oracleUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1015-gkeopUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-1028-gkeUpgrade linux-image-6.8.0-1029-ibmUpgrade linux-image-6.8.0-1031-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-generic-64k-6.8Upgrade linux-image-kvmUpgrade linux-image-6.11.0-1013-raspiUpgrade linux-image-6.11.0-26-generic-64kUpgrade linux-image-6.8.0-1031-nvidia-64kUpgrade linux-image-6.8.0-1033-gcpUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.0-1031-raspiUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-6.11.0-1015-gcpUpgrade linux-image-awsUpgrade linux-image-azure-fdeUpgrade linux-image-nvidia-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-lowlatency-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-ibmUpgrade linux-image-azure-nvidia-6.8Upgrade linux-image-6.11.0-1016-oracleUpgrade linux-image-azure-nvidiaUpgrade linux-image-azure-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-generic-64kUpgrade linux-image-6.11.0-26-genericUpgrade linux-image-6.8.0-1032-awsUpgrade linux-image-gkeUpgrade linux-image-aws-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-gkeopUpgrade linux-image-raspi-realtimeUpgrade linux-image-oem-22.04cUpgrade linux-image-azure-nvidia-lts-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-raspi-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-6.11.0-1022-oemUpgrade linux-image-nvidia-64kUpgrade linux-image-ibm-classicUpgrade linux-image-6.11.0-1010-realtimeUpgrade linux-image-generic-6.8Upgrade linux-image-genericUpgrade linux-image-aws-lts-24.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-6.8Upgrade linux-image-oem-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-realtime-6.8.1Upgrade linux-image-6.8.0-1034-azureUpgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-1022-azure-nvidiaUpgrade linux-image-virtual-6.8Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-1033-gcp-64kUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-1031-oemUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-6.11.0-1015-azure-fdeUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1034-azure-fdeUpgrade linux-image-oem-22.04dUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-gcpUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-64-lowlatency-64kUpgrade linux-image-6.11.0-1014-awsUpgrade linux-image-6.8.0-2026-raspi-realtimeUpgrade linux-image-6.11.0-1015-gcp-64kUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-azure-lts-24.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-64-lowlatencyUpgrade linux-image-azure | May 21, 2025 | Feb 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 2, 2025 | Feb 27, 2025 |
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